As soon as you create space between your head and the helmet with a beanie you are more susceptible to concussions because now there is space for your head to move around. If you want it to be safe then just use it with the padding in it.
"The only people who end up in the friend zone are the weak." - Tingas_Hats
All aboard the ruckus bus.
"You think you die alone, but that's not true. Nobody is alone in this world. We have to coexist and take care of each other." -Azusa Hayano